Improvement in ore-washers



l. T. HA LSTEAD.

Ore-Washers.

N0. 142,848. Patented Septemberl6, 1873.

Wmesses: Inventor:

Ano' eys.

UNITED STATES PATENT OFFICE.

IRA T. HALSTEAD, OF FREDONIA, NEW YORK.

IMPROVEMENT IN ORE-WASHERS.

Specification forming part of Letters Patent No. 142,848, datedSeptember 16, 1873; application filed July 26, 1673.

To all whom it may concern:

Be it known that I, IRA 'l. HALSTEAD, of Fredonia, in the county ofChautauqua and State of New York, have invented a new and usefulImprovement in Apparatus for Removing Sulphurets, Gold, Silver, &c.,from Ores, of which the following is a specification Figure 1 is avertical longitudinal section of my improved apparatus taken through theline 00 a, Fig. 2. Fig. 2 is a top view of the same.

Similar letters of reference indicate corresponding parts.

My invention has for its objectto furnish a simple, convenient, andefl'eetive apparatus for collecting sulphurets, gold, silver, 850., fromores. The invention consists in the employment of one or more sieves, inconnection with one or more sluices and pivoted boards for separatingthe sulphurets and heavier particles of ore from the stream of water andpulverized ore passing through the apparatus, as hereinafter fullydescribed.

A is a sluice-box, in the upper part of which is secured a sieve, B. Atthe lower end of the sluice A is placed a board, 0, which is pivoted atthe lower part of its end edges to the sides of the sluice A. D is asecond sluice, which is placed at a lower level than the sluice A, andwhich has a sieve, E, secured in the upper part of its upper end. At thelower end of the sluice D is placed a board, F, which ispivoted at thelower part of its end edges to the sides of the sluice D, as shown inFigs. 1 and 2. The pivoted boards 0 F are prevented from passing beyonda vertical position by stops G attached to the sides of the sluices A D,for the said boards to strike against. The apparatus should be slightlyinclined to allow the water and. sand to flow 0ft freely.

The ore to be operated upon is pulverized as fine as is usual inquartz-mills, and a stream of water and pulverized ore is made to flowinto the sieve B, through which they pass into the sluice A, where thesulphurets and the heavier particles of the ore settle. From the sluiceA the water and lighter particles of ore flow over the board 0 into thelower sieve E, through which they flow into the lower sluice D, wherethe heavier particles of the ore settle, and from which the water andlighter particles of the ore flow over the board F. As the heavierparticles of the ore accumulate in the sluices A D, the pivoted boards 0F rise toward a vertical position.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The employment of the sieves B E, one or more, inconnection with one or more sluices, A 1), and pivoted boards G F, forseparating the sulphurets and heavier particles of ore from the streamof water and pulverized ore passingthrough the apparatus, substantiallyas herein shown and described.

IRA T. HALSTEAD.

Witnesses:

ALONZO LEUES, I. W. DAMON.

